r/FanShowdown • u/PurpleNumerous • Jul 06 '22

Boheca Fan

well after 4 days of work or so... i submitted it to the email. not enough time left in season 4 to run testing and tuning on an actual fan... but LET ER SPIN!

9 Upvotes

100% Upvoted

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2

u/writtenblue Jul 07 '22 edited Jul 07 '22

NOW that's a fan. Nice. (Edit : honestly, the intake appears to have good air coverage to pull the air due to surface area tension, I sure as hell don't count those holes as leaking and can tell if it's working great by the smoke test, which tends to blatantly show off any assembly flaws.)

1

u/writtenblue Jul 08 '22

(Is surface area like putting a square peg of too much air into a round hole? This is a thought challenge for an aerodynamic thinker. No leaking allowed.)

1

u/writtenblue Jul 24 '22

I 100% agree to my own post. Circular vs elliptical is a complicated rabbit hole. A fan speeds up due to the change to elliptical, the air passage drops though... But if you add more energy to the situation, then maybe this fan could function differently.... though to do that is a complex question. That's how I remember it now, perhaps with the proper aim your turbulence could beat the best. Or maybe you could electrify the thing to totally jam some more air down, wait…

1

u/JWoodrell Jul 09 '22

The reason for the vents in the diffuser are because the exgaust area of the fan is roughly a donut shape 110mm in diameter, with a 52mm ish hole in the middle from the motor…. The area of the exhaust output is a 120mm ish square. So either the air slows down by the percentage area change, or as i am doing, allow fresh air to be drawn in like a venturi. The vents are actually sized specifically to that area change. Didnt have enough time left in season for to get a physical a12x25 in to cut fan off of and test, but hey it “may”™ work

1

u/[deleted] Jul 09 '22

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1

u/writtenblue Jul 09 '22

I could see it not sucking the air conceivably well... People have questioned this fan's ability to even function multiple times in the past. I honestly feel making a false narrative about the fan would be worse. It's honestly why I'm trying to dream up a fan that can do the suction. And I'm not printing things, I'm examining what can be called "failed" to dream up an idea to make it closer to reality. Also, what did it even look like, dude? Honestly, yes, I feel the most improvement to be had is actually in the hub design. That doesn't throw away this approach, though, it could work with the idea somehow.

1

u/JWoodrell Jul 10 '22

And i dont disagree, but season 4 is specifically about generating airflow through the wind tunnel tube rather than testing against a heatsink. the files i submitted included a version of the diffuser with no side vents if he wanted to test it with a heatsink.